I can attest to my band mate stripping a thick finish off of a few solidbody guitars, spraying on a very thin lacquer finish and having a noticeable change in the acoustic tone. It's parallel to the 'blanket on speakers' analogy.
Does the acoustic tone give a major indication of what the tone will be plugged in with pickups and an amp?
In blind tests, people have a much harder time hearing things when they can't see the change.
I'm fairly sure that commercially manufactured basses have always gotten sanding sealer before paint of any kind and the pores of the wood are sealed before the first coat of paint goes on.
So, when Fender talks about certain retro paint finishes letting the wood breathe, I get a little suspicious of it being a marketing ploy in response to long standing customer generated rumors.
There are basses that were rumored to be maple bodied and people liked them, when it was found out that the bass was plywood, everybody was way less enamored with it....same bass it always was but the used prices for them went way down.
Lots of people seem to like the sound of basswood guitars and basses, until they find out they are basswood.
We all know there are a number of things that contribute to the sound of an electric bass, I wonder how far down that list the type of paint is?
Pickup type, and brand, and number
Amp type and brand and settings
Strings, lots of variation
Bridge type and metals that are used
Nut material
Fretboard wood species or not in the case of CF necks
Body wood species and the specific piece or pieces chosen
Scale length
Bolt on, set neck, neck through
Fingers or pick or slappy thumb
Effects used and/or no effects
Paint type or no paint at all